Barra Says New Top Managers in Synch on Margins, Market Share Goals

General Motors Co. newly appointed Chief Executive Mary Barra said she intends to accelerate the auto maker's ongoing push to expand profit margins in North America while increasing its global market share.

"We have momentum," Ms. Barra said in interviews on Thursday at the company's headquarters in Detroit. "There is an opportunity to accelerate what we are doing because there are pockets of good things going on and...